Mr c is so mean. he designs detention for mathias where he needs to start 80 feet away from the door and can move halfway each minute. when he reaches the door, he can leave. when can he leave?

At the county fair, the baxter family bought 6 hot dogs and 4 juice drinks for $12.90. the farley family bought 3 hot dogs and 4 juice drinks for $8.55. find the price of a hot dog and the price of a juice drink.